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Modeling and measurement of residual stresses in a forged IN718 superalloy disc

Dye, D.; Roder, B.A.; Tin, S.; Rist, M.A.; James, J.A. and Daymond, M.R. (2004). Modeling and measurement of residual stresses in a forged IN718 superalloy disc. In: ed. Superalloys 2004. Warrendal, PA, USA: Minerals, Metals and Materials Society, pp. 315–322.

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Abstract

The residual stresses present in a quenched IN718 aeroengine compressor disc forging have been characterized using neutron diffraction and the results compared to those obtained from a finite element (FE) model for the quenching process. The ~40 kg forging had a diameter of ~400 mm and a maximum thickness of ~45mm. Neutron path lengths of up to 60 mm were required to record strain components at the deepest points within the material. The residual hoop and radial stresses measured are generally compressive at the surface, up to 600 MPa and tensile at depth, up to 400 MPa, whilst the radial stresses are generally small. The deviatoric stresses are generally <150 MPa. FE model predictions of the residual stress are reasonable agreement with the measured values.

Item Type: Book Chapter
ISBN: 0-87339-576-X, 978-0-87339-576-2
Extra Information: This book documents the proceedings of the 10th International Symposium on Superalloys. The Superalloys meetings, begun in 1968, take place every four years, and their proceedings have become invaluable resources in the field. Superalloys 2004 includes work presented by researchers, producers, and users of superalloys on the most recent technical information on these high-strength, high-temperature alloys. This volume contains both a subject index and an alloys index for easy reference.
Keywords: quenching; residual stress; forgings; neutron diffraction
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Item ID: 6970
Depositing User: Martin Rist
Date Deposited: 22 Feb 2007
Last Modified: 02 Dec 2010 19:57
URI: http://oro.open.ac.uk/id/eprint/6970
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